Solved

Swing applet deployment

Posted on 2000-02-28
6
424 Views
Last Modified: 2013-11-23
I wrote an applet using Swing. When I deployed the applet, it seemed that I have to put all the swing class into the jar file. If I missed something, the excetion should be like this:

java.lang.Error: can't load javax.swing.plaf.metal.MetalLookAndFeel
  at java.lang.Throwable.<init>(Compiled Code)
  at java.lang.Error.<init>(Compiled Code)
  at javax.swing.UIManager.initializeDefaultLAF(Compiled Code)
  at javax.swing.UIManager.initialize(Compiled Code)
  at javax.swing.UIManager.maybeInitialize(Compiled Code)
  at javax.swing.UIManager.getUI(Compiled Code)
  at javax.swing.JPanel.updateUI(Compiled Code)
  at javax.swing.JPanel.<init>(Compiled Code)
  at javax.swing.JPanel.<init>(Compiled Code)
  at javax.swing.JRootPane.createGlassPane(Compiled Code)
  at javax.swing.JRootPane.<init>(Compiled Code)
  at javax.swing.JApplet.createRootPane(Compiled Code)
  at javax.swing.JApplet.<init>(Compiled Code)

(Running with NetscapeNavigator 5.7. When running with IE5: class can not instantiated).

How can I pre-install swing on the client machine so that the jar file for the applet doesn't need to be too big? Do I need to install the packages manually for each client machine, or just put some kind of plugin on the web?
This question is applied for Netscape Navigator and Internet Explorer.
Thank you.
0
Comment
Question by:daitt
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 
LVL 3

Accepted Solution

by:
slok earned 100 total points
ID: 2564158
I suspect it is your browsers runtime
environment that causes this.

To my knowledge, both IE and Netscape
runtime environment is still at 1.1

try including a Java plugin which you
can download from JavaSoft.

NOTE : you need to install the Java plugin...

http://www.javasoft.com/products/plugin/

and in your HTML, include this line
instead :

<embed type="application/x-java-applet; version=1.2.2" width=600 height="400" CODE="YourClass.class" pluginspage="http://java.sun.com/plugin/1.2/plugin-install.html"></EMBED>

hope this helps

0
 
LVL 1

Expert Comment

by:my_moon011000
ID: 2566197
I had same problem with swing applet. This code helped, just put it into HTML-page. Plugin will be uploaded if there is no swing-components on the client computer. Here is the code:

<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
     width="900" height="600" align="baseline"
     codebase="http://java.sun.com/products/plugin/1.2.2/jinstall-1_2_2-win.cab#Version=1,2,2,0">
 <PARAM NAME="code" VALUE="Applet.class">



 <PARAM NAME="type" VALUE="application/x-java-applet;version=1.2.2">
 <PARAM NAME="model" VALUE="models/HyaluronicAcid.xyz">
 <PARAM NAME="scriptable" VALUE="true">
 <COMMENT>
     <EMBED type="application/x-java-applet;version=1.2.2" width="900"
        height="600" align="baseline" code="Applet.class"

     
      model="models/HyaluronicAcid.xyz"
        pluginspage="http://java.sun.com/products/plugin/1.2/plugin-install.html">
     <NOEMBED>
     </COMMENT>
            No JDK 1.2 support for APPLET!!
     </NOEMBED></EMBED>
 </OBJECT>


Change Applet.class with your applet name.
0
 
LVL 3

Author Comment

by:daitt
ID: 2567152
Thank you for your great helps. slok's answer is the basic solution, clients must go download and install the plugin themselves. my_moon's code allows my webpage to download and install the plugin automatically if it's not been installed (I'll use this code).
Who should I give the points to?
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 3

Expert Comment

by:slok
ID: 2567226
just some correction here :

the code that I posted will help the user download the plugin as well
if it detects that the user did not install the plugin.

the only reason why I ask you to download and install the plugin first
is so that you will not be prompted to download the plugin.
Rather, you will have the environment setup and ready to debug your
applet.

However, my_moon also include the HTML code for MSIE which I did not.
0
 
LVL 3

Author Comment

by:daitt
ID: 2567349
Sorry i didn't get the solutions exactly.

I got this error with MSIE code:
Cancel Java(TM) Plug-gin installation due to user's request or downloading errors.
Java applets or JavaBeans components in this HTML page will not be displayed properly in Internet Explorer. To restart the installation, please refresh the HTML page in Internet Explorer

Anyway I think I don't need the advantage for IE. I'll give slok the points.
Thanks for you two.
0
 
LVL 3

Author Comment

by:daitt
ID: 2567436
For more information about java 1.2.2 plugin for the intranet:

http://java.sun.com/products/plugin/1.2/docs/intranet.html
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How to get all the API from website? 11 160
iterator/ListIterator approach 17 68
runtime exception 2 65
Firefox and firebub 5 26
By the end of 1980s, object oriented programming using languages like C++, Simula69 and ObjectPascal gained momentum. It looked like programmers finally found the perfect language. C++ successfully combined the object oriented principles of Simula w…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…
Viewers will learn about basic arrays, how to declare them, and how to use them. Introduction and definition: Declare an array and cover the syntax of declaring them: Initialize every index in the created array: Example/Features of a basic arr…
Suggested Courses

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question